Spark plug cleaner



May 22, 1945.

c. B. M PHERSON SPARK PLUG CLEANER i-"iled Aug. 26. 1944 Patented May22, 1945 UNITED STATES PATENT OFFICE SPARK PLUG CLEANER Charles B.McPherson, Birmingham, Ala. Application August 26, 1944, Serial No.551,318

1 Claim.

This invention relates to a spark plug cleaner and has for its mainobjects to provide a device of this character which will be small so asto be part of the tool equipment of an automobile, highly efficient,cheap to manufacture, easy to operate, and simple in structure. It maybe used from a compressed air source where the same is available, orwith air from an ordinary hand tire pump. Other advantages will appearparts throughout the views.

Again referring to the drawing in detail it will be seen that the devicecomprises a pear shaped outer frame or bracket that is attached at itssmall end to a piece of tubing 3 that is provided with a threaded holell into which a regular spark plug I with threads 2 is set or screwed infor cleaning. A suitable cloth bag 4 of a shape simulating a pear andnot airtight,

has its small end tightly fit around the tube 3. The large end of thebag is held between jam nuts 'l8 that are carried on a threaded portionof an air'tube 6 that extends from outside and through the large end ofthe bracket 5 and down to near the bottom of the tube 3. A small amountof sand or other abrasive material I!) is put into the bag through thespark plug hole while holding the device with the hole at the top.Compressed air from a source (not shown) enters through a flexible tube9 attached to the outer end of air tube 6. shown in its disconnectedposition l-a, 2-41.

, To use the device the spark plug I is screwed into the threaded holeII with hole at top, then the cleaner is reversed with the hole inbottom position, then air is forced in through the air tube 6 andagita'tes the sand that has settled in the bottom of the tube 3 andspark plugrecess. The agitation of the sand cuts the carbon accumulationoff f and out of the spark plug. Then the cleaner is reversed to put thespark plug at the top so as it may be removed. without allowing the sandto fall out of the bag. When sand becomes dirty it is replaced withclean sand.

The various parts of the cleaner may be made from any material bestsuited for the purpose.

While I have shown and described the preferred embodiment of myinvention 1 do not The spark plug is also wish to limit same to theexact and precise details'of structure, but reserve the right to makeall changes and modifications so long as I remain within the spirit andscope of the following claim.

Having described my invention I claim:

Aportable spark plug cleaner of the class described comprising a metalband frame, said frame being larger at one end than the other, a shortpiece of tubing attached to the small end of said frame, a non-airtightcloth bag of a shape substantially like a pear contained within saidframe by means of jam nuts clamping its large end to said frame and itssmall end adapted to fit tight around the inner end of said tubing, theouter end of said tubing having a threaded hole adapted to fit the screwportion of a spark plug, an air tube entering the large end of saidframe and the large end of said bag, said air tube having a threadedportion for accommodating said jam nuts and for connecting means to asource of compressed air, the other end of said air tube reaching to apoint just short of the inner edge of said threaded hole, a small amountof granulated abrasive material contained within said bag.

CHARLES B. MCPHERSON.

